New Zealand Prime Minister Jacinda Ardern joins Christiane Amanpour in Paris to discuss her efforts to lead a global reformation of social media in the wake of the far-right terror attack in Christchurch. New Yorker writer Masha Gessen then talks Trump and Putin with our Michel Martin. Finally, Kelsey Grammer and Danielle de Niese discuss their production of Man of La Mancha.

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